package com.kfit.filter;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.annotation.WebFilter;

/**
 * 
 * 使用注解标注过滤器
 * @WebFilter将一个实现了javax.servlet.Filter接口的类定义为过滤器
 * 属性filterName声明过滤器的名称,可选
 * 属性urlPatterns指定要过滤 的URL模式,也可使用属性value来声明.(指定要过滤的URL模式是必选属性)
 * @author Angel(QQ:412887952)
 * @version v.0.1
 */
@WebFilter(filterName="myFilter",urlPatterns="/*")
public class MyFilter implements Filter{

	@Override
    public void init(FilterConfig config) throws ServletException {
        System.out.println("过滤器初始化");
    }
	

	@Override
    public void doFilter(ServletRequest request, ServletResponse response,
            FilterChain chain) throws IOException, ServletException {
        System.out.println("执行过滤操作");
        chain.doFilter(request, response);
    }
	
	@Override
	public void destroy() {
		 System.out.println("过滤器销毁");
	}
}
